Vacuum cleaner



FIG. 1 is a front perspective view of a vacuum cleaner, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is an enlarged top view thereof;

FIG. 7 is an enlarged bottom view thereof; and,

FIG. 8 is a rear perspective view thereof.

The broken lines illustrating portions of the vacuum cleaner form no part of the claimed design. 

CLAIM The ornamental design for a vacuum cleaner, as shown and described. 